Packing device for steam joints of drier cylinders and the like



Y 1,I 4, July 5, 1927. A' BIRCH l 63 821 PACKING DEVICE FOR STEAM JOINTS OF' DRIER CYLINDERS' AND THE LIKE Filed Oct. 9, 1924 AMM Patented July 5, `19.27. l i

UNITED ,g STATES A1 Arr.N'r OFFICE.

ARTI-IUR-BIRCH, OF ARLINGTON, MASSACHUSETTS.

v IACIKIINTG DEVICE FOR kSIJEAIVE JOINTS F DRR CYLINDERS AND THE LIKE.

packed around the said journal to prevent the escape of the steam or other fluid vem-.

Vployed, and in conjunctionl with a ring of packing, devicesvare employed to hold the said ring in place and compress it into the required close fit.v As heretofore constituted the said devices have been unsatisfactory in practicev by reason'of dillierent disadvantages and drawbacks. The general.v object of the invention is to provide vadjustable jacking holdino" and coinoressinn devicesV d C C) 'free from such disadvantages vand drawh backs. A y f j An illustrative embodiment oi: the invention is shown in the accompanying drawings,

in which 'latter Fig. l is an elevation of one end-portion of a cylinder, a gear wheel connected there- 7 with, and a bearing receiving the correspending cylinder-trunnion, with said vembodiment combined therewith.

Fig. 2 is a view on a larger scale than Fig. 1, showing` the trunnion and its bears ing, vand the packing adjusting devices comprised in the said embodiment. I j

Fg. 3 is an elevationshowing the packing adjusting devices separately.

Fig. l is a view in cross-section on linev 4, l, of Fig. 3.

In practice it is common to mount a 1101-' low journal 1 (Fig. 2) of a hollow rotary cylinder 2 (Fig. 1) within a bushing 3 (Fig.

2) in a bearing pedestal el upon the top of a fixed support 5, the said journal being permitted to rotate inside the said bushing and both the said support and the bearing pedestal being chambered to permit flow of the steam or other fluid through the hollow journal. It is Vusual to place around the inner portion of the said rotary journal within a seat at the inner end of said bushing a ring of packing 6, Fig. 2, to prevent outflow of said Huid between the exterior of the journal and the interior of the busha ing ci' the bearing, and further it is usual within the chamber of pedf estasi il. spider, as 7;,.Fgl having. a ring@ parlions if sere y Application filed October 9, 1924. Serial No. 742,600.

shaped portion 71 which makes contact with the packing-ring. lVith such spider is combined ordinarily adjustable means for pressing. it with the requisiteV force lagainst the packing-ring, to compress the latter snugly against its seat and the exterior of the hollow journal, as will befunderstood 'trom F `2 of the drawings. An opening in the back of the cliambered pedestal is closed by means ot a removable plug 8, vwhich is screwed into alace. vfif'hen this alu@ isout of the said opening, access to the interior of the chamber is permitted, and the packing-ring and Spider may be placed in positio'n,.or removed and replaced.

. lnaccordance with the invention I locate the adjustable pressure devices externally of the pedestal, so that they are both visible and readily-accessible. For the purpose of establishing operative connection between the said externally located devices and the spider 7 located withinlthe chamber of the bearing, l employ a pin 9 which is disposed axially with respect to the said spider and the plug 8, it extending through a central .axial hole in the plug and engaging by its inner end with the central portion of the spider. vTo prevent' leakage` through said central hole around the said pin, the plug is formed at its outer side with a central chaniberSl in which is placed packing 82 lthat is'compressed upon the pin by means of a smaller plug, l0, having also a central hole through which pin 9 extends. The out-er portion of the pin projects beyond the smaller plug and is engaged by tensionspring devices by means of which pressure .is exerted upon the pin with a tendency to .push it lengthwise inwardso as to bear the ring 71 of the spider against the packing 6. The tension spring devices comprise essentially an expanding spiral spring 11 and an adjustment screw 12. The threaded stem of the said screw occupies a threaded hole in a cross-bar 13 carried by the outer ends of two rods, 14, 14, projecting parallel with each other outward from the main plug 8..

The tension spring` is interposed between the inner end of the screw 12 and the 'outer end of the pin 9, and its tendency to expand lengthwise exerts the `pressure aforesaid against the pin; vWith the screw and pin are combined convenient abutments for the respective ends pfthe spring, constituted by collars, l15 la, tted u on reduced end# a an'- pin, in cautela `vieible.

with adjacent shoulders` torined upon `the screw and pin. The collars have peripl'ieral rollara against which the ende4 oit: th api-ing; take bearing.

ily adjustment ol the Screw eudwiae` cl2 l'eeted by riitatine the saine within the screw-threaded hole through the erosa-bar lil, the spring is compressed eiul\\'ise,`or allowed to expand inversely. as may be desired in tighteningY up or slackingr ol'.

The described tension and adjustment deriaee, by reason ot' being located externally ot' the bearing' and its chamber. are clearly Their condition, and their adjustw nient are apparent to the eye ot an attendant.

What is claimed as the invention isz- Il. The combination with a rotarjT cylinder having` a hollow journal. a, chan'lbered bearnu;f within which said journal rotates, said parts providing tor tlow of tluid through aaid journal between the bearing-chamber and the interior ot' the cylinder, packing around said journal within which the latter `rotatea1 and `a coinpreaaioi'i-spider for Said packing, ol` spring-pleasure devices located visiblyexternallj7 otl the said bearing, operatirely conibined with said spider, and includingl a acrew by which the tension ot the spring is adjusted as required.

2. The combination witlra rotarjfY cylinder nl iaving a hollow journal, a bearing within which said journal` rotatee haring a {luidchaiubei.' ,communicating with the` passage through said journal, packing around said journal within which the latter rotates, a eonipreasioirspider tor said packing, and an axially-located pin extending through a hole in oneiside ot the chamber into engagei nient with said spider, a eprint;` tending' to bear Said pin endwise to press the spider alg-runat the packingiand ineens for adjustiup,v the tension otf the aprilia", with said lapi-ing;- and adjusting lucana located riaibly externally ol the bearing4 and ita chamber.

3l. 'lhe combination with a rotary c yl iiuleinlnirilie a hollow journal. a bearing;l within which `Said journal rotate4 having.;- :t Huid-chamber communicating with the pas-- Sage. through said journal, and having alan an openingY aligned with said journal, a plugl applied removably to :laid opening', packina around said journal in connection with Said bearing: and a compression-epider tor said packing, ot an axialljnlocated pin e1\'- tending through a hole in said pluginto engarementl with said Spider packing in connection with Said plug; iior Said pin, a pressure spring; engaged with the outer end of said pin, an adjustn'ient Screw eiigajged with Said spring, and a screw tlireaded bearinev vfor Said screw carried by the Said plug. It. The combination with a cylinder haring;- a hollow journal, a beariln;v for Said journal having; a [luid-Chamber communicating with the. passage through said journal, and having` also an opening; aligned with said journal, a plug applied removably to Said opening, packing around said journal, and a compresaioirspider lor Said paekinjr, ot an axialljfeloeated pin extending;` through a hole in said plug into engagement with Said spider, a pressure spring,- engaged with the outer end ot said pin. an adjustment Screw engaged with aaidepring, a. screw threaded bearing` through which said screw extends and rods extending;l outward troni the said plug supporting; by their outer portione the said screw-threaded bearing.

ARTHUR BIRCH. 

